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Commerzbank · Sofia

AI Prompt Engineer Intern

SofiaEarly careerEUR 80 monthOperations

Listed on Commerzbank’s official careers site. Posted October 15, 2026. Check that it is still open and apply there.

Apply on Commerzbank’s careers site →

Job description

Your tasks Learning from and being mentored by some of the best IT experts; Developing and refining complex prompts and chains to solve specific business problems. Working with developers to integrate LLM capabilities into wider application architectures. Implementing RAG (Retrieval-Augmented Generation) pipelines to ground model responses. Establishing evaluation metrics to measure prompt performance and drift. Resolving issues related to hallucinations or latency.

Creating automated test suites for prompt regression testing. Contributing to the internal library of prompt patterns and best practices. Working in a real agile environment and collaborating with international teams who are friendly, supportive and open to new opinions and ideas; Supporting the teams with various tasks related to the projects; Your

Profile Currently a bachelor’s or master’s student in a technical major; Highly motivated to learn new things and shape your future career in IT; Familiar with Generative AI and Prompt Engineering , Have knowledge of Python, LangChain, RAG & Vector Databases, Model Fine-Tuning, API Integration and Agentic AI Workflows Familiar with

Azure OpenAI Service, Knowledge Graphs, Semantic Search, Model Destillation and Multi-modal Models High analytical thinking with attention to details and problem-solving attitude.

Customer orientation and proactive and ownership attitude to deliver results on time and with highest quality. Excellent collaboration and communication skills. High flexibility and adaptability to a fast-changing environment. Good team player with high ability to work in international teams. Fluency in English – both written and spoken. German would be considered as an advantage.

In return, we offer

Good work-life balance, annual paid leave , flexible working hours, work-from-home and work from abroad opportunities; Luxury package of additional health and dental insurance; Food vouchers in the amount of EUR 80 monthly; 6 additional annual days off for exceptional circumstances Employee assistance program for psychological, financial and legal consultations; Multisport card; Annual contribution of EUR 153.39 net per child for a summer camp/school/kindergarten for children up to age of 15; Possibilities for building career-advancing skills by covering training/certification courses and conferences based on individual learning and development needs, access to an online learning platform; Opportunities for long-term professional development in a stable, 150-year-old company while contributing to the vision of a new, just starting Digital Technology Center; Friendly and supportive multicultural environment, open to new opinions and ideas.

Commerzbank is proud to be an equal opportunity employer, committed to creating a diverse environment. All qualified applicants will receive consideration for employment without regard to gender, race, color, national origin, religion, gender identity or expression, sexual orientation, genetics, disability, age, or any other characteristics. The company Do you want to gather professional experience while learning? Become part of Commerzbank DTC Bulgaria internship program – AcceptIT.

It aims to provide you with essential work and IT skills and prepare you for a future employment and continuing career within our center. Commerzbank is a leading international commercial bank with branches and offices in almost 50 countries. We are looking for an intern to join our Flexhub team.

Program overview

Duration: 9 months Conditions: Paid internship (full-time)

Team

Flexhub Contact Ready to accept the challenge? Apply now with your up-to-date CV in English. Due to the high volume of applications, we contact only the candidates who best match the role requirements. If you do not hear from us within 14 days, please consider that we won't proceed with your application at this stage.

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